Using these pillow covers is a breeze. Just unzip them and insert your pillow inserts. You can use them indoors on your sofa, bed, or outdoor patio furniture. They'll add a coastal touch to any space. As for maintenance, spot - clean them with a mild detergent and water if they get dirty. Avoid using harsh chemicals. When not in use, store them in a dry place. Since they're UV and water - resistant, they can handle some outdoor elements, but it's a good idea to bring them inside during extreme weather. There's no need to assemble these pillow covers as they come ready to use. Just pick the right pillow inserts to go with them according to your preference and you're all set.